A gripping tale of WWII naval warfare in the Baltics, starring John Mills as Lt. Freddie Taylor, a British submarine Captain. The crew of the Sea Tiger are summoned from leave on shore with their families, and sent on a secret mission to intercept the Nazi battleship Brandenburg. In the ensuing battle the British submarine is damaged by a German destroyer. The submarine is leaking fuel so badly that the crew won't be able to make it back to Britain before running out somewhere along the Danish coast. When it seems that their only option may be to blow up the submarine and try to escape to Denmark, seaman James Hobson hatches a plan...
John Mills
as Lt. Taylor RN
Eric Portman
as L/S Hobson
Louis Bradfield
as First Officer - Lt. Brace, R.N.R.
Ronald Millar
as Third Officer - Lt. Johnson, RNVR
Jack Watling
as Navigating Officer - Lt. Gordon, R.N.
Reginald Purdell
as Coxwain - C / P.O. Dabbs
Caven Watson
as Chief Engine Room Artificer - C / P.O. Duncan
Niall MacGinnis
as Torpedo Gunner's Mate - C / P.O. Mike Corrigan
Leslie Weston
as Leading Torpedo Operator - L / S Tug Wilson
Norman Williams
as Periscope Operator - 'Canada'
Lionel Grose
as Torpedo Operator - 'Spud'
David Peel
as Helmsman - 'Oxford'
